“There’s really been no evidence that blue-light blocking glasses have any health benefits or even ocular benefits when it comes to eyes,” said Rahul Khurana, a vitreoretinal surgeon and spokesperson for the American Academy of Ophthalmology who was not involved in the study.
Three of the 17 trials in the review evaluated blue-light reflecting lenses and eyestrain. The common outcome measure was a subjective visual fatigue score. All three trials, with a combined 166 participants, reported no significant difference in visual fatigue between those wearing blue-light filtering lenses compared with those wearing lenses that don’t filter blue light.
“When the optical shop tries to talk you into the blue blocker, just say, ‘I don’t think so,’ ” he said. “That would be my response.”
Possible remedies for eyestrain
There are things people can consider besides buying blue light glasses, experts say.
Use the “20-20” rule. Every 20 minutes you’re staring at a screen, look at an object 20 feet away for 20 seconds, Khurana said.
Sit about an arm’s length from the computer screen.
If you wear contact lenses and your eyes feel dry, take a break by wearing your regular prescription glasses.
Have glasses that are powered appropriately. “Because if your prescription is off a little bit, that’s going to cause more eyestrain than anything else,” Miller said. “People should get glasses that are appropriate for the typical distance that somebody sits from the screen.”
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